(going) down the rabbit hole - definition and synonyms

  1. used for referring to a situation that is strange, confusing, or illogical, and often hard to escape from

    Quoting from the people themselves is the easiest way of showing just how far down the rabbit hole we are going here.

    Professor John Kennedy invites us to jump down the rabbit hole and imagine a world where U.S. Supreme Court justices are elected democratically.

Word story
From Alice’s Adventures in Wonderland, a famous children’s story by Lewis Carroll in which a girl called Alice falls down a rabbit hole into a strange dreamlike world.
See also main entry: rabbit hole